13553244 has 60 divisors (see below), whose sum is σ = 36082200. Its totient is φ = 4434912.

The previous prime is 13553209. The next prime is 13553257. The reversal of 13553244 is 44235531.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18762 + ... + 19470.

It is an arithmetic number, because the mean of its divisors is an integer number (601370).

Almost surely, 2^13553244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13553244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18041100).

13553244 is an abundant number, since it is smaller than the sum of its proper divisors (22528956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13553244 is a wasteful number, since it uses less digits than its factorization.

13553244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784 (or 773 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 13553244 is about 3681.4730747352. The cubic root of 13553244 is about 238.4227826447.

Adding to 13553244 its reverse (44235531), we get a palindrome (57788775).

The spelling of 13553244 in words is "thirteen million, five hundred fifty-three thousand, two hundred forty-four".